Confucious was never Korean. He was originally from Shang Dong province...then called Lu. Whomever is saying this is wrong. They are just trying to steal credit to show that Koreans made Confucianism. However, it is debatable whether Lao Tzu could have been a Korean...but I highly doubt it.

been to shandong and been to confucious birthplace and hometown. visited his tomb too. those koreas are probably having inferiority complex, that they simply cannot accept the fact that their most treasured ancient school of thoughts actually came from another country.